An infinite wire having charge density λ=10 NC/m is moving along its axis with speed 100 m/s. Find magnetic field at a distance 4cm perpendicular to wire.

1.8 X 10-12 T 0.5 X 10-12 T 3 X 10-12 T 1.2 X 10-12 T

0.5 X 10-12 T

dQ =  λdx